Definition

Narcolepsy is a disorder of the nervous system. It results in frequent, involuntary episodes of sleep during the day. Sleep attacks can occur while you drive, talk, or work.

Causes

The cause is unknown. It is thought to have a genetic link. There is increasing evidence that it may be an autoimmune disorder. In this type of disorder, the body’s own immune system attacks a part of the brain.

Risk Factors

Having family members with narcolepsy is a risk factor for the condition.

Symptoms

Symptoms usually start during the teenage years. Onset may range from 5-50 years old. Symptoms may worsen with age. They may improve in women after
menopause.

Symptoms include:

Excessive daytime sleepiness

Daytime involuntary sleep attacks

Unrefreshing sleep

Sudden loss of muscle tone without loss of consciousness

Temporary paralysis while awakening or falling asleep

Frightening mental images that appear while awakening or as one falls asleep

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